Albeet kibks



(ModeL) A. KIRKS.

LOCK.

No. 329,456. Patented Nov. 3, 1885.

5 WITNESSES NVENTOR ATTORNEY Unirnn Sterne Parent Orrrcn,

ALBERT KIRKS, OF CANTON, OHIO, ASSIGNOR TO THE DIEBOLD SAFE AND LOOKCOMPANY, OF SAME PLACE.

LOCK.

BPECIPICATION forming part of Letters Patent No. 329,456, dated November3, 1885.

Application filed August 17, 1885. Serial No. 174,591.

ToaZZ whom it may concern:

Be it known that I, ALBERT KIRKS, a citizen of the United States, and aresident of Canton, county of Stark, State of Ohio, have invented a newand useful Improvement in Safe-Deposit Locks, of which the following isa full, clear, and exact description, reference being had to theaccompanying drawings, making part of this specification.

My invention relates to an improvement in the construction of key-locksfor safe-deposit boxes which are operated by means of two keys ofdifferent forms. One key, generally called the master or pass key,operates on all the locks, and is kept in possession by the cashier orother official in charge. The other is an individual key for each box,and belongs to the renter of same.

Escutcheons were formerly used in connection with safe-deposit locks tocover and secure the key-holes, the key of the escutcheon being used bythe cashier as apass-key for the locked box. These escutcheons, however,proved a source of constant annoyance to the cashier, by having to beunlocked and locked again whenever the boxes were opened to thecustomers, because the escutcheon could not be attached securelyon theoutside of the door, and were an interference to the full opening of thedoor, by reason of the projection striking the adjoining boxes, as wellas being dustcatchers. To overcome and avoid these objectionablefeatures, a look was constructed with but one key-hole to accommodateboth 5 the master and individual keys. The mechanism for each key waswithin the same lookcase, and required the service first of theinaster-key and then of the individual key to be opened; but as bothkeys employed the same key-hole, trouble and confusion were frequentlycaused by a failure to use the keysin the right succession. Astep inadvance of this was the invention of a lock with two key-holes, soconstructed that the keys could not be interchanged or inserted butwhere they belonged; but these latter locks left the keyholesunprotected, so that other persons could have accessto the same, and, byaccident or design, tamper with and derange the lock by using 59 keysnotintendedtobeinserted therein. Thus (Model.)

instances are also recorded where locks were opened by parties operatingin the manner indicated. The present invention is designed to protectthe key-holes of such locks without resorting to escutcheons on theoutside of the 5 5 door. The device provides a mechanism entirely withinthe lock, which operates a blind to cover the inside entrance of thekey-hole, so that a key cannot enter from the outside until theobstruction is removed or thrown off by 60 the master-key. The shape andstyle of this contrivance may be made differently to conform to thedifferent construction of locks; but as an illustration of the manner ofits application recourse is here had to alock which is provided with twokey-holes, both the master and individual keys operating the same set oftumblers, the master-key lifting one or more, and the other key workingon the remaining tumblers. In this lock I cut a groove in the post,whichreceives the individual key at a place beneath where one of the tumblersrests, and make a slot of suflicient depth to allow the tumbler to dropdown below the point of the key-entrance. This tumbler then blocks up 75 the opening for the individual key 5 but on the introduction of themaster-key it operates in its place to lift up and remove saidobstruction and give entrance to the individual key. The tumbler thusemployed is so formed as to cover the key-hole only so far as there areno grooves in the key. The key can therefore be removed without theassistance of the master-key, and the custodian of same need not be keptin attendance for the purpose of locking the customers box. By thewithdrawal of his key his box is locked and the key-hole closedautomatically by action of the tumbler which forms the obstruction.

Figure l is a plan view showing the locklid A, revolving posts 13 and H,and the keyways a and a, also showing an obstruction, b, in the keywaya. Fig. 2 is same view, with lid A removed and the head of the revolvingposts B and H cut away, leaving the stem or body of the posts inposition, and again show ing an obstruction, Z), in the keyway a and thepass-key O entered; Fig. 3, same view, with the upper tumbler, No. 6,removed, the master-key 0 turned to a position at right angles 10:)

lock-bolt E thrown in and the master-key O" removed; Fig. 5, same viewof lock-box F, the tumblers and revolving post removed, showing thelock-bolt F in position. longitudinal view showing the parts all inposition, the pass-key having been entered and turned so as to raisetumbler No. and remove the obstruction from the keyway a oftheindividual key D, which is now in the-post and may be passed into thelock. Fig. 7 is an elevation of the revolving key-post B, showing groove01 in cross-section and the-cam tfor throwing the lock-bolt.

. F isa quadrilateral lock-box provided with perforations c,throughwhich screws or rivets may be passed to secure the lock in position, aspring-rest, e, threadedlid-supports f, perforationsg g, to support theends of the keyposts B and H, an upwardly-projecting pin, t, to check orterminate the movement of the tumbler, also the elevations j, whichcheck the movement of the pass-key. The lid'Ais adapted to the box F,and is providedwith a perforation, h, adapted topin h,and'upwardlyprojecting escutcheon-cylinders k k, that embrace andsupport the revolving key-posts B and H. The four corners of the lid maybe cut away or perforated for the passage of screws or rivets. Thelock-bolt is of theusual form, having a heavy rectangulanformedbolt-head and a flat plate extending into the lock, in which there isprovided an oblong slot adapted to pin h, whichsupports the bolt in aposition parallel with the sides of the lock-box. This boltis providedwith a projecting rib, y, which is adapted to theslots in the end of thetumbler, and is also provided with a notch, r, on one side, forengagement with a cam or projection, i, from the rotary post B, by whichengagement the bolt E is thrown to and fro. The tumblers number from onetosix, and are of the same general contour, excepting No. 5, whichisprovided with adownwardly-projectingobstructing-blind, b, which will behereinafter explained. The tumblersmay be made of sheet metal of about No. 15, and in form to have a horizontal body part, G, and adownwardlyprojected toe, G, in one end, and aperforation, m, adapted tothe post h, aboutwhich they rotate. The other endisprovided with aslot,'n, which is cut at a point of elevation differing each one from theother, anda slot, o,receives and retains the spring 1;, which isformedabout the rounded end of each. tumbler and rests under the rib e,in which position the exertion of the spring tends to rotate thetumblers Fig. 6 is a about the pin h and in so doing to force the headsof the tumblers in a downwardly direction until theyrest upon the postB. The rotary post B is adapted at one of its ends to perforationgin thelock-box, and hasan outwardly-projecting cam, t, which, as the post isrotated, engages with the lock-bolt E in the notch r. A narrow grooveextends through the length of the post out from the surface to thecenter, forming a keyway for the key D. In the body of this post,directly under tumbler No. 5, and at right angles with the key way,there is a groove, S, cut to the depth of the keyway. The other end ofthe post is enlarged, so as to cover the body of the key D. The post 11has a groove or keyway cut through its entire length, and from thesurface to the center, one end adapted tothe perforation g in thelock-box, the other end provided with acollared head, which rests undera shoulder in the escutcheon-cylinder k. The keywaysa anda are ofunequal size The way a in post B is deeper and narrower than the way ain post H, so that the master-key C will not enter the keyway in post B,nor the individual key into the keyway innthe post H, as each key isadapted to the'way provided for it. The keys are fiat and have notchededges,- the notches. varied to circumstances. The master-keys for oneset of locks may be duplicates, varying only for different sets oflooks; but not so with the individual keys, as they should be fitted toone lock only. In this case the master-key is constructed with aprojection, s, which engages with thetoe of tumbler No. 5, pressing itout', as seen in Fig. 3, and raising the body up, so that the slot 12.will be in line with the rib y, and the obstructing-blind b lifted outof the groove S, so that the individual key D may be entered, which isprovided with grooves and, projections adapted to raise theremainingtumblers, so as to bring theseveral slots (indicated by-the dottedlines, see Fig. 2) in. line withthe' slot nin the tumbler raised by themaster-key, and when so brought into line the rib y will entertheslotted ends of the tumblers, as thelockbolt is moved in by the camt, and as the key and postare turned intoposition, as shown in Fig. 4.After the turning of thisindividual key and unlocking-the door themasterkey maybe withdrawn, as the door can be locked and the individualkey withdrawn.

I do not wish to limit myself toyablind on any one of thetu mblers, aseither of them, or more than one, may. be used for that purpose.

' Having thusfully described the nature and object of my invention, whatI clain1,.an.d desireto secure by- Letters Patent, is-- 1. Inasafe-deposit lock having twoseparate key-holes on one side of the lockoper- IIO ated by two different -keys -a pass-key and a regular key-anobstruction adapted tocover the key-hole of the regular key, and atumbler connected with the obstruction, whereby when the pass-key isintroduced. and turned the tumbler is operated and the obstructionremoved from the key-hole of the regular key, substantially as setforth.

2. In a safe-deposit lock having two separate key-holes 011 one sideoperated by two different keysa pass-key and a regular keya tumbler andan obstruction connected therewith,and adapted to cover the keyhole otthe regular key and prevent the insertion of the regular key without theassistance of the passkey, the parts being constructed and arranged topermit of the removal of the regular key without the assistance of thepass-key.

3. In a safe-deposit lock having two different key-holes on one sideoperated by two different keys, bot-h operating one set of tumblers, sothat one key operates one part of the tumblers, the other key theremaining tumblers and the lock-bolt, one or more of the tumblersoperated by the pass or master 20 I11 testimony whereof I have hereuntoset 25 my hand this 15th day of August, A. D. 1885.

ALBERT KIRKS.

Witnesses: W. K. MILLER, BURT A. MILLER.

